EjGASA6 promotes flowering and root elongation by enhancing gibberellin biosynthesis

Abstract

The () gene family is involved in the regulation of gene expression and plant growth, development, and stress responses. To investigate the function of loquat genes in the growth and developmental regulation of plants, a loquat gene homologous to was cloned. expression was induced by gibberellin, and ectopic transgenic plants containing this gene exhibited earlier bloom and longer primary roots since these phenotypic characteristics are related to higher gibberellin content. Transcriptome analysis and qRT-PCR results showed that the expression levels of and which encode key enzymes in gibberellin biosynthesis, were significantly increased. Furthermore, we confirmed that EjGASA6 could promote the expression of the luciferase reporter system. Overall, our results suggest that promotes blooming and main-root elongation by positively regulating gibberellin biosynthesis. These findings broaden our understanding of the role of GASAs in plant development and growth, and lay the groundwork for future research into the functions of in regulating loquat growth and development.